+91-8076753736 support@wiredfaculty.com

Sponsor Area

The D-And-f-Block Elements

Question

Wired Faculty App

Compare the stability of +2 oxidation state for the elements of the first transition series.

Solution

In the beginning of 3d transition series, Sc²⁺ is virtually not known or in other words it is not stable in comparison to Sc³⁺, Ti²⁺, V²⁺, Cr²⁺ are known but less stable in comparison to their most common oxidation state of +3.
In the middle Mn²⁺, Fe²⁺, Co²⁺ are known and quite common. In fact Mn²⁺ and Mn⁷⁺ are most stable in Mn. Fe²⁺ is less stable in comparison to Fe³⁺ but is due to fact that Fe³⁺tends to loose one electron to aquire d⁵ structure which has extra stability. Co²⁺ is less stable as compared to Co³⁺. Ni²⁺ is most common and most stable among its +2, +3, +4 states. Cu²⁺ is more stable and is most common species as compared to Cu¹⁺. At end Zn forms only Zn²⁺ which is highly stable as it has 3d¹⁰ structure.

Some More Questions From The d-And-f-Block Elements Chapter

Explain why Cu⁺ ion is not stable in aqueous solutions?

Actinoid contraction is greater from element to element than lanthanoid contraction. Why?

On what ground can you say that scandium (Z = 21) is a transition element but zinc (Z = 30) is not?

The outer electronic configuration of copper is 3d¹⁰ 4s¹, yet it is considered transition element. Why?

Why the melting points of transition elements are high?

Why Zn, Cd and Hg are not regarded as transition elements?

Name the first element of 3rd transition series.

Though copper, silver and gold have completely filled sets of d-orbitals yet they are considered as transition metals. Why?

Why are transition elements so named?

Mock Test Series

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation